drummond



v (No Model.) -3' Sheets Shee't 1-.

D. D. DRUMMQND.

GRADING MACHINE.

No. 600,999. v PatentedMar. 22, 1898;

(No Model.) 3 Sheets-Sheet 2.

'1). D. DRUMMOND.

GRADING MACHINE.

No. 600,999. Patented Mar. 22', 1898.

(No Model.) 3- SheetsSheet 3.

D. D. DRUMMOND.

' GRADING MAQHINE. No. 600,999. Patented Mar. 22, 1898.

7 ,UNITED-STATES- PATENT OFFICE.

DAVID D. DRUMMOND, OF OHIOAGO, ILLINOIS, ASSIGNOR OF HELDMAI'ER & NEW, OF SAME PLACE.

ONE-HALF TO GRADlNG-MACHlNE.

SPECIFICATION forming part of Letters Patent No. 600,999, dated March 22, 1898.

Application filed December 14, 1896. Serial No. 615.660. (No model.)

To all whom it may concern:

* Be it knownthat I, DAVID D. DRUMMOND,

. of Chicago, Illinois, have invented certain paratus intended for'grading' land-surfaces,

and more particularly for grading the sides of embankments or thewalls or slopes of ditches and other subsurface channels.

The invention may-be embodied in a variety grading the sloping walls of a subsurfacechannel or canal, such apparatus being intended for use in completing the work by the removal of those portions above the gradeline and the filling of depressions below said line.

' In the accompanying drawings, Figure 1 is an elevation showing a car or other vehicle in end view, a boom supported at one end thereon and at the other end upon a track, and also the grading implement in sideview. Fig. 1 is a detail view showing the arrangement of the-cable-sheaves at the outer end of the boom. Fig. 2 is an elevation showing a modified construction wherein the support for the outer end of the boom is omitted. Fig. 3 is a crosssection through the boom, showing a carriage mounted to traverse thereon and the grading implement flexibly suspended therefrom in end elevation. j Fig. 4 is a sectional profile of a ditch'or canal in the unfinished condition, the grade being shown by the dotted line. Fig. 5 is a perspective view showing theadjusting mechanism.

In carryingout my invention I provide a car or other vehicle, (marked 5,) which maybe provided with Wheels 6, adapted to travel on the track-rail 7, laid in'the bottom of a ditch or canal. This car may have an engine or other motor, as 8, mounted thereon and geared to the track-wheels, or a separate locomotive may be provided. Mounted upon this car is a boom 9, which boom maybe of the bridge type (shown inFig. 1) and have its outer end supported upon the track-rail 10. This construction is'preferred where the embankment is of such width as to make it inconvenient or impracticable to support the boom entirely from the car; but for shorter grades the construction shown in Fig. 2 is preferred, and the boom may be supported by the braces 12 and guy rial to be distributed and the character of such material. In Fig. 1 the implement represented is an ordinary steel scraper pivoted in a framework 18 and having stops 19 at its rear end. The flexible connections may be so arranged that the rear end of the gradingimplement may be elevated for the purpose of dumping the load; but where the amount of material to be-handled is small and it is simply desired to level the surface the implement need not have any scoop-body. In some instances the implement will have a straight sharp edge, as for cutting earth, and in other cases its lower surface will be provided with teeth, as shown at 20, Fig. 3. I prefer to employ a roller or traveler 2l, journaled in the rear end of the frame 18, which will not only steady the grading implement in its work, but will also prevent its cutting-too deep,-acting as a gage. An operating-cable 22 is connected to the grading implement and is carried over one or more drums or sheaves 23 at the outer end of the boom and likewise over a guidi'ngsheave or sheaves 2d at the inment tow-ardthe car or drawing it outwardly 5 to the outer end of the boom. A cable 26, made fast at one end to the cable 22, is carried over a sheave 27 at the outer end of the boom and is made fast to the carriage. The cable 26 is of such length and is so connected IOO to the main operating-cable that it will permit the traverse of the carriage while maintaining it in proper position with reference to the grading implement, and when the motor is reversed the cable 26 will haul the carriage back to the upper end of the boom. The flexible connections permit the grading implement to swaylaterally or rise vertically to pass unyielding obstructions. In its operation the gradingimplement, being suspended so that its acting edge is in the plane of the desired grade or parallel thereto, is caused to move along the surface, cutting away those portions of the surface above the grade-line and depositing the material thus removed in the depressions or cavities below said gradeline. I find that a flexible connection of the grading implement to the carriage is preferable. Such carriage of course supports the weight of the implement and of its load, and the flexible connections may readily be arranged so that the position of the implement can be fixed with reference to the amount of material which is to be removed and also with reference to the distance between the gradeline and the lower side of the boom. This may be effected by the mechanism shown in detail in Fig. 5, in which the carriage 15 is provided with drums 28, to which the chains or other flexible connections 16 are connected, said drums being mounted on shafts 29, provided with wrench-grasps 30 or other suitable means whereby they may be rotated to adjust the position of the grading implement and with ratchet-wheels 31 and pawls 32 to secure the same in position after adjustment.

This improved grading-machine has been found highly eflicient and economical in actual practice. I do not, of course, limit my invention to the precise construction nor to the uses mentioned.

I claim- 1. A grading-machine comprising a car or other vehicle, a boom mounted upon such car and extending outwardly therefrom a grading implement supported from said boom and a cable connected to the grading implement whereby it may be drawn back and forth in line with the boom and in contact with the surface below it, substantially as described.

2. A grading-machine comprising a car or other vehicle traveling in a line parallel to the surface to be graded, a boom mounted upon such car and projecting laterally over the surface to be graded a grading implement flexibly supported from said boom and an operating-cable having a strand thereof connected with the grading implement whereby it may be drawn back and forth in line with the boom and toward and from the car, substantiall y as described.

3. A grading-machine comprising a car or other vehicle, a boom mounted thereon and extended outwardly therefrom, a carriage traversing said boom, a grading implement flexibly connected to the carriage and an operating-cable connected to the carriage and to the implement and whereby the implement may be drawn back and forth in line with the boom, substantially as described.

t. A grading-machine comprising a car or other vehicle, a motor mounted thereon, a boom supported at one end upon the car or vehicle and extending outwardly therefrom and with an upward inclination, a traveling support for the outer end of the boom and a grading implement suspended from the boom and movable along the surface below the boom and in line therewith, substantially as described.

55. A grading-machine comprising in combination a car or other vehicle, a motor mounted thereon, a boom supported at one end upon the car or vehicle and extending outwardly therefrom, a carriage traversing the boom, a grading implement suspended from said carriage, a main operating-cable connected to the grading implement and a secondary or auxiliary cable connected to the main cable and to the traversing carriage, substantially as described.

DAVID D. DRUMMOND.

Witnesses:

O. O. LINTHICUM, FREDERICK O. Goonwm. 

